@article{1077473250,
author = {Hsiung, Chuan-Chih},
title = {A projective invariant of a certain pair of surfaces},
journal = {Duke Math. J.},
volume = {12},
number = {1},
year = {1945},
pages = { 441-443},
language = {en},
url = {http://dml.mathdoc.fr/item/1077473250}
}
Hsiung, Chuan-Chih. A projective invariant of a certain pair of surfaces. Duke Math. J., Tome 12 (1945) no. 1, pp. 441-443. http://gdmltest.u-ga.fr/item/1077473250/